Driving device for forced-lubrication apparatus



Dec. 5, 1927. 1,651,916

C. H. CLAUSEN DRIVING DEVICE FOR FORCED LUBRICATION APPARATUS Filed Jan. 12. 1924 3 Sheets-Sheet 1 C. H. CLAUSEN DRIVING DEVICE FOR FORCED LUBRICATION APPARATUS Filed Jan. 12. 1924 3 Sheets-Sheet 2 Dec. 6, 19,27. 1,651,916

(} c. H. CLAUSEN DRIVING DEVICE FOR FORCED LUBRICATION APPARATUS Filed Jan. 12. 1924 3 Sheets-Sheet 5 Patented Dec. 6, 1927.

UNITD STTES rice.

CARL HERMAN CLAUSEN, OF SOLVESBORG, SWEDEN, ASSIGNOB TO PATENTAKTIE- BOLAGET CENTRAL-SMRJ-NING, OFSOLVESBORG, SWEDEN, 'A GORPOIEtJ-k'lION' OF SWEDEN.

DRIVING DEVICE FOR .FORCED-LUBRICATEON "APIiARATUS.

Application filed January 12, 1924, Serial No. 685,911, and. in Sweden March 12, 1923.

It has previously been proposed to make the various pump units in forced lubrication apparatus independent of each other so that they individually may be taken out of the container or the casing containing the lubrieating means, and for this'purpose a suitable construction of the driving device is. required to enable such removalof'the oil pumps. In the most of the forced lubrication apparatus each pump unit comprises a pump piston'and a valve piston, which pistons are adapted to move in a certain manner in correct relation to each other as regards timing. To drive such forced lubrication apparatus it has previously been proposed to arrange in the oil casing a driving shaft provided with toothed wheels and to journal on the frame of each pump unit two toothed wheels ongaging each other one of the toothed wheels being brought to engage with the toothed wheel on the driving shaft when connecting the pumpunit with the oil casing. Each of the toothed wheels on the pump unit has been, combined with a cam adapted to drive the pistons by means of pivoted forks riding on said cams.

Such devices as above described are howevercombined with drawbacks which substantially consist in that the driving device .for each pump unit is fairly large and complicated and requires a relatively great space, so that the whole size of the forced lubrication apparatus is considerably augmented and the apparatus therefore becomes more expensive and takesmore space than is suitable or even necessary. Further one has to take care when insertinga pump unit in the oil casing that the gearing attached thereto is connected in a right way with the toothed wheel on the driving shaft, that is to say that the toothed wheel of the pump unitand 'the pistons of the latter have the right position relatively to the connection with the driving shaft and thus with the other pumps in the apparatus. This means that the inserting of a pump unit in the forced lubrication apparatus requires special attention and that skilled workmanship is required for correctly carrying outsuch inserting;

According to the present invention these drawbacks have been removed and the drivingmechanism, forming the subject matter for the invention, will be considerably simpler, cheaper and -:of less :size than those hitherto in use or proposed, and it is to be added that any incorrect inserting of a pump unit in the apparatus cannot occur, for the unit cannot simply be inserted otherwise than in a correct manner. According to the invention each pump 'unit is in the usual manner provided with a pump piston and a valve piston and these pistons are drivenby eccentrics and pivoted forksexactly in agreement with the previously adopted'principle, but the difference in respect of the older de vices for the same purpose consists in that the construction is carried out in such a manner, that all toothed wheels are elminated and that the cams are arranged directlyon the driving shaft journalled in the oil casing. The driving device for the various pistons is moreover so constructed, that the oil pressed out of the pump'cylinder at each secondpressure stroke of the pump piston is passed to the respective lubricating pipe whilst a corresponding oil quantity at the intermediate pressure strokes of the pumppiston is in a known manner pressed back through an oil gauge pipe to the oil casing, so that the satisfactory working --of the pumps may be observed.

The invention will more fully appear in the following description taken in conjunction with the accompanying drawings in which I Fig. 1 is a side view of the forced lubrication apparatus partly in a vertical section parallel to the driving shaft.

Fig. 2 is a top view of the same.

Fig. 3 is a transversal section of the apparatus through a pump unit.

Fig. 4 is a similar section adjacent pump units.

Fig. 5 shows diagrammatically and in a between two larger scale the principle of the driving mechanism.

The apparatus shown in the Figures 1 and 2 comprises four pump units each of which may be separated from the apparatus, but it should be obvious that the number of units is independent of the invention and may vary according to circumstances.

In the drawings 1 clenomi'natesthe oil casing having filling device 2 and the oil gauge 3, and in the casing 1 four pump units denominated :in general with 4 are mounted. A driving shaft 5 is further journalled in the oil Teasing 1 :sa idlshaft being rotatable in a suitable manner and carrying directly the eccentrics 6 and 7 needed for the driving as will be more fully described in the following. The pump unit substantially consists of a pump piston 8' and a. valve piston 9 (Fig, 3) which are movable in corresponding cylinders by means of the above named cams and pivoted forks and 11. coacting with the said cams, the

- forks 10, ll'being arranged on the same stud 12 (see also Fig. 1) fixed to the frame of the pump unit inquestion. The folks have therefrom extending arms which by links are connected witlrthe respective pistons and ing shaft move the pistons 8 and 9 are open at their lower part, as -shown in the drawing, and as each pump unit 4 constitutes'a separate part and the frame of each pump unit forms a detachable cover of the apparatus all pump units may independently of each other be taken out of and inserted in the apparatus by raising and lowering the same ina vertical direction relativelyto' the oil casing'l and the driving shaft 5 ar ranged therein. As the two cams 6, 7 belonging to the samepump unit have a fixed position in relationto each other (they are bothsecurely fixed to the driving shaft), any incorrect inserting of a-pump unit can- 7 not possibly occur.

Referring to Fig. 5 it is disclosed that both the cams are provided with four cam parts corresponding to working periods and four intermediate substantially concentric parts corresponding to resting periods of the pistons. The form of the cam 7 adapted to drive the pump piston is such that the outline is symmetrical in respect of a horizontal diametrical plane through the axis of rotation, and the cam 6 adapted to drive the valve piston has an. outline which on the one side of the same diametrical plane is approximately uniform witli'the o'utlineo't' the cam 7, whilst the eccentric 6 on the opposite side of the said plane has a smallest radius which is approximately so much less thanthe smallest radius of the cam 7 as the difference is between the greatest and smallest radius of the latter. In the cams'the angular "distance abv corresponds to a resting period,'bc a working, 0 Z a restin'g, el e a working,-e -if a resting, f-g a work, g-h a resting and ha a working period. As disclosedby the drawing (Figs.

and 6 arranged on the driv-' 3 and 5) the fork 11 embraces the cam 6 at a horizontal diametrical plane through the axis of rotation,but the fork 10 embraces the cam '7 somewhat above this diametrical plane or in other words in such away that when the working parts of the fork 11 register with two concentric parts of the cam 6 the working parts of the fork 10 register with two cam parts of the cam 7, which results in that a resting period of the one piston occurs at the safe time as a working period occurs at the other piston and vice versa, and with regard to the above described form andthe relative positioning of the cams the mode ofoperation ofthe pump unit will be as follows :In referring LII toFig. 3 in which the pump piston 8 is in the '7 middle of a suction stroke the pump cylinder .be ng n communication with the suction pipe 16 through the port 1d and the recess 15 in the valve piston and assuming that the cams rotate in the direction indicated by the arrow-it will be seen that the piston Sis moved upwards in completing the suction stroke whilst the piston t) stands still, and that the valve piston 9 thereupon goes up, closes theport 14 and'brings its channel 17 in conjimunication partly with the port 18 and partly with a passage 19 leading to the oil gauge pipe 20 so that the oil sucked previously into the pump cylinder, when the pump piston thereafter is 'moved downwards, is pressed through the oil gauge pipe back to the oil casing. ,After thepump piston'has completed this pressure stroke the valve piston returns to the position shown in the drawing, and when the pump piston thereupon has completed a new, suction stroke the valve piston j is moved downwards a further. amount. and connectsby means of its passage 21 the port 18 with the passage '22 leading to the lubrication places, so thatthe oil at the next pressure stroke of the pump piston is pressed to the lubrication places. Beforethe pump piston commences a new suction stroke the valve piston returns to the position shown in the drawing, whereupon the cycle indicated' above is repeated, so that thus the oil. is

pressed through the oil gauge pipe at each both cams 6 and 7 vary in their side forma tion as shown in that figure from the'th'eoretical form shownin lines to adopted form shown in full lines. Such amodification is on account of the unavoidable play between the forks and the cams permissible and even without any influence the working of the remaining units, but it should be obvious that the contemplated driving mechanism also may be adapted in such forced lubrication apparatus in which such a removal and exchange of individual units is not possible on account of the construction of the rest of the apparatus, and the invention therefore is not limited to the use in apparatus of the first named type.

It is apparent that through the construction described the pump unit may be readily and conveniently lifted out of the casing as such unit is moved on the cover of the apparatus and the forks are open at their lower ends. 7

WVhat'I claim and desire to secure by Letters Patent is r 1. In a forced lubrication apparatus, a casing adapted to contain a supply of oil, a driven shaft mountedv in the casing, a plurality of independent pump units arranged in the casing to permit selective separation of such units from the casing at will, each pump unit comprising a" valve element and a pump element and an operating fork for each of said elements, a pair of cams arranged on the driven shaft for each pump element, the operating forks of each pump unit cooperating with the cams arranged for such unit, the operating forks opening down wardly and cooperating with the cams from above, whereby to permit the independent separation of any pump unit without disturbing the relation of the operating parts of said unit and without interfering with the operation of any of the other units.

2. In a forced lubrication apparatus, a casing adapted to contain oil, a shaft mounted in said casing and provided with a plurality of sets of cams arranged in pairs, series of independent pump units to be arranged in said casing, each comprising a frameto be removably secured to the casing, a pump element carried by the frame, a valve element carried by the frame, and two downwardly opening forks supported upon the frame to cooperate with a pair of cams to operate the pump element and valve element, the frame member of each pump unit being connected to the casing to permit the independent separation of that unit as an entirety from the casing Without interfering with the operation of the remaining units.

In testimony whereof, I have signed my name to this specification.

CARL HERMAN CLAUSEN. 

